Mold sander



May l2,` 1925. 1,537,225

R. P. M. DAvls MOLD SANDER May 12, 1925. 1,537,225

' R. P. M. DAVIS MOLD SANDER Filed oct, 5. 1923 2 sheets-smeg z Patented VMay 12, 1925. j

UNITED STATES ROY 1. M. Davis, or jaen-nrc Union, PENNSYLVANIA. e

, MOLD SANDER.

Application sied october 5, 1923. serany Ne'. 666,804@

To all yio/zom t 77mg/ concern.

Be it known that Roy P. M. Diivis, a citizen ot the `United States of America, residing at Mount Union, in the county of Huntingdon and State of Pennsylvania, hasfinvented certain new and useful Improvements 'in Mold Sanders, of which the following is speciiication. Y

My invention relates to method of and apparatus for sanding brick molds.

In the manufacture of molded brick it is necessary to sand the mold to prevent sticking of the raw material thereto andto facilitate withdrawal of the brick from the mold. It is very important that the proper amount oi sand be'used, as an insuiiiient quantity will not accomplish the desired purpose, and a'surplus has a tendency to scale off, making an irregular brickfwhich has not the desired sliapeand dimensions,

The object of my invention 1s to overcome the above mentioned difiiculties.

In the accompanying Vdrawings-z i Figure 1 is avertie/'al sectional view, of my invention disclosed in Figure 2;

Figure 2 is a section on the line 2"-2 of Figure 1, f Y

Figure 3 is a fragmentary detail yview showing the mold in elevated upright posiV tion above the sand hopper; and

Figure 4; is a fragmentary vdetail View showing the gear and rackv for elevating, lowering and inverting the mold.

Referring more particularly to the drawings, 5, denotes a sand box adapted to be secured to the frame 6, of a brick making machine. The box 5, comprises end plates 7,

- secured to the frame Vas at 8, and side plates 9 and 10. The plate 9, is cut away at its upper end, and the top edge of the plate is bent outwardly to provide a'ledge 41, for a purposeV `hereinafter described, while the f lower portion 11, of the'plate 9, extends outwardly' and downwardly at an angle. The

side plate 10, which parallels the plate 9, terminates opposite the point of bend 12, of plate 9, and has hinged thereto as at 13, a

plate or door 14, having an inwardly bent extremity or lip 15. When the plate or. door 14:, is swung to Figure 1 position toward the bent lower portion 11, of pla-te 9, the lipxl, will spring over the extremity of said lower portion 11, and lock the'door closed.

Sand 16, is admitted to the sand box by means of pipes or conduits 17, projecting through the side plate 9,0116 or more branch pipes 13, being provided so as to givev an approximately uniformr distribution throughout the length .of the box.' rFliese pipes or conduits 17, communicate with a sand storage bin (not shown) suitabiy posi l tioned and elevated so as to cause the sand to tiow freely by gravity into the sand box.

The outlet end of the pipes'or conduits 17, are purposely located within the sand -box somewhat above the lower end or apex of the box so that the fiow of sand will become choked after a comparatively small quantity .has been delivered to the sand box.

Mounted at tlie'top or open end of the' sand box 5, is a saddle 19, comprising a pair of parallel rails 20, secured as at 21, to the ends of-a U-bar 22. This Ufbar is secured to trunnions and 24 by sleeves 23 and 211 as at 25 and 26 respectively', the trunnions being` mounted in bearings 27 and 28 secured to the end plates 7. A mold cover plate 29, is secured to the innerface of the U-bar by any suitable means (not shown).

The numeral 30, designates the lifting rails of a stripper carriage for4 stripping the mold from the brick (not'shown)k and transferring the mold to the saddle19. vThe rails 30, with the mold 31,r thereon are elevated mechanically by means (not shown) or manually from the dotted line to the full line position (Figure 1), and the mold is then moved mechanically by means (not shown) or :manually from thevrails 30, over the inclined ledge 41, to the rails 20, of the saddle, thecut away portion of the plate 9, Y

providing an opening 32, through which the open ended mold may pass. Projecting through the lower portion 11, of the plate 9, ofthe sandbox below the outlet 39, of pipe17, are aiplurality of upwardly curved jets or nozzles 33, communi# eating with a manifold 34, adjacent the sand box, the manifold in `turn communicating' with a supply of compressed air through pipe 35. A valve 36, mechanically operated through a lever 37, and rod 38, by any suitable means (notshown) or manually con `trols the supply of air to the nozzles.

After the empty mold 31, has been transferred from the tracks 30, to the `saddle ltracks 20, the valve 36, is opened, admitting by the saddle 19. The entire inner surface of the mold `including the partitions 47, are thus electually sprayed. The amount oilv sand thus deposited or sprayed is governed by the air velocity and by the length ot time the spraying continues. Both these factors are controllable through the manual or other means actuating the rod 3S, by Varying the degree and time interval of the opening of the valve.

As the sand is taken up by the mold, additional sand is automatically fed through the conduits 17, until the outlets 39, thereof become choked, as when more sand is fed kthan required, or when the valve 36, is closed.

After the mold has been sanded it is inverted and elevated to Figure 3 position hy means of a toothed rack bar 10, meshing withV a pinion 11, lixed on the trunnion 27. The rack bar is actuated either manually or by any mechanical means (not shown) to cause alturning movement of the saddle 19, and mold 31. about the axis of the trunnions 23 and 24. From the Figure 3 position the ymold is transferred to a carriage (not shown).

In the event the supply of sand in the sand box 5, becomes contaminated with mud or otherforeign matter dropping from the mold, the door 14, is swung open to dotted line position Figure 1. whereupon the contents will be discharged `by gravity into thepit 12. Y

VWhat I claim as my invention is:V

1. In `an apparatus'for sanding open ended molds, la sand box open at its top end, means 'sand box,

for feedingfsand to the lower end of the box, means positioned at the upper end of said box adapted to support a mold, a cover plate secured to said last mentioned means for normally closing the top of the mold and sand box, and means for forcing 'sand upwardly through the mold and against said cover plate.

2. In an apparatus for sanding molds, a sand box, means for feeding sand to the box, means carried by the sand box for pivotally supporting a mold and means for spraying sand against said'mold.

In an apparatus for sanding open ended molds, a sand box, means for -feeding sand to the box, a mold support on said box, means for positioning a mold on said support, means for forcing said sand against the mold and means 4for inverting said mold and said mold support.

f1. In an apparatus for sandingV molds, a a saddle supported -by said box having tracks thereon, vertically movable mold supporting tracks adjacent the tracks on. said saddle for transferring the mold to said saddle, means for feeding sand to the box and means for introducing air into said sand Ato force lsaid sand upwardly against the mold after it has been transferred to said saddle and means for inverting the saddle and mold.

In testimony whereof I aflix my signature in presence of two witnesses.

ROY P. M. DAVIS.

Witnesses:

V. L. WALLETr, 'ERMA -RosENsTEEL. 

